Display apparatus having a thin-film encapsulation layer

Abstract

A display apparatus includes a substrate comprising a display area and a non-display area. A light-emitting device is on the display area. A thin-film encapsulation layer is on the light-emitting device. The thin-film encapsulation layer includes at least one inorganic encapsulation layer and at least one organic encapsulation layer. The organic encapsulation layer includes a plurality of organic particles having a core-shell structure that includes a hollow core and a shell surrounding the hollow core. A touch unit is on the thin-film encapsulation layer.

What is claimed is: 
     
       1. A display apparatus comprising:
 a substrate comprising a display area and a non-display area; 
 a light-emitting device on the display area; 
 a thin-film encapsulation layer on the light-emitting device, the thin-film encapsulation layer comprising at least one inorganic encapsulation layer and at least one organic encapsulation layer, wherein the organic encapsulation layer includes a plurality of organic particles having a core-shell structure that includes a hollow core and a shell surrounding the hollow core; and 
 a touch unit on the thin-film encapsulation layer. 
 
     
     
       2. The display apparatus of  claim 1 , wherein the organic encapsulation layer has permittivity of about 2.6 or less. 
     
     
       3. The display apparatus of  claim 1 , herein the organic encapsulation layer has a refractive index of about 1.4 or less. 
     
     
       4. The display apparatus of  claim 1 , wherein the shell comprises a high molecular weight material. 
     
     
       5. The display apparatus of  claim 4 , wherein the shell comprises at least one compound selected from an acrylic polymer, polyimide, an urethane polymer, a styrene-based polymer and a siloxane-based polymer, an epoxy-based polymer. 
     
     
       6. The display apparatus of  claim 1 , wherein a surface of the shell is electrically neutral. 
     
     
       7. The display apparatus of  claim 6 , wherein the surface of the shell does not include any charged particles thereon. 
     
     
       8. The display apparatus of  claim 1 , wherein a thickness of the shell is about 5 nm to about 50 nm. 
     
     
       9. The display apparatus of  claim 1 , wherein a diameter of each of the plurality of organic particles is about 10 nm to about 200 nm. 
     
     
       10. The display apparatus of  claim 1 , wherein:
 the organic encapsulation layer includes an organic encapsulation material comprising a monomer-based organic material, and 
 the organic particles are included in the organic encapsulation layer at a percentage of about 10% to about 80% of a volume of the organic encapsulation material. 
 
     
     
       11. The display apparatus of  claim 1 , wherein:
 the touch unit is directly on the thin-film encapsulation layer, wherein the touch unit comprises: 
 a detection electrode on the display area; and 
 a signal line on the non-display area and connected to the detection electrode. 
 
     
     
       12. The display apparatus of  claim 11 , wherein the detection electrode has a mesh shape. 
     
     
       13. The display apparatus of  claim 11 , wherein:
 the detection electrode comprises a first detection electrode and a second detection electrode; and 
 the signal line comprises a first signal line connected to the first detection electrode and a second signal line connected to the second detection electrode. 
 
     
     
       14. The display apparatus of  claim 11 , wherein the detection electrode comprises:
 a first conductive layer; 
 a second conductive layer on the first conductive layer; 
 a first insulating layer between the first conductive layer and the second conductive layer; and 
 a second insulating layer on the second conductive layer. 
 
     
     
       15. The display apparatus of  claim 14 , wherein the first conductive layer and the second conductive layer are electrically connected to each other via a contact hole defined in the first insulating layer. 
     
     
       16. The display apparatus of  claim 14 , wherein:
 the light-emitting device comprising a pixel electrode, an opposite electrode on the pixel electrode, and an intermediate layer including an emission layer between the pixel electrode and the opposite electrode; and 
 a distance between the first conductive layer and the opposite electrode is about 5 μm to about 20 μm. 
 
     
     
       17. A display apparatus comprising:
 a substrate; 
 a pixel electrode on the substrate; 
 an intermediate layer arranged on the pixel electrode and comprising an emission layer; 
 an opposite electrode on the intermediate layer; 
 a thin-film encapsulation layer on the opposite electrode and comprising an inorganic encapsulation layer and an organic encapsulation layer located on the inorganic encapsulation layer, wherein the organic encapsulation layer has a permittivity of about 2.6 or less; and 
 a touch unit directly on the thin-film encapsulation layer and comprising a conductive layer configured to detect an external input. 
 
     
     
       18. The display apparatus of  claim 17 , wherein the organic encapsulation layer comprises an organic encapsulation material and a plurality of organic particles having a core-shell structure that includes a hollow core and a shell surrounding the hollow core. 
     
     
       19. The display apparatus of  claim 17 , wherein the organic particles comprise at least one compound selected from an acrylic polymer, polyimide, an urethane polymer, a styrene-based polymer, a siloxane-based polymer, and an epoxy-based polymer. 
     
     
       20. The display apparatus of  claim 18 , wherein a surface of the shell is electrically neutral. 
     
     
       21. A thin-film encapsulation layer for a display apparatus comprising:
 at least one inorganic encapsulation layer; and 
 at least one organic encapsulation layer; 
 wherein the at least one organic encapsulation layer includes:
 an organic encapsulation material comprising a monomer-based organic material, and 
 a plurality of organic particles having a core-shell structure that includes a hollow core and a shell surrounding the hollow core; 
 
 wherein the organic particles are included in the organic encapsulation layer at a percentage of about 10% to about 80% of a volume of the organic encapsulation material.